Dust devils are created when vortices of air - set in motion when warm air rises from the surface on an otherwise still day - pick up dust from the ground. The dust reaches such great heights because of Mars's relatively low gravity.

This dust devil was snapped on 16 February in an area in Mars's northern hemisphere known as Amazonis Planitia. Its sinuous shape comes from "a westerly breeze partway up the height of the dust devil", NASA says.